Support compile-time constant int val in the form of polynomials. (#2372)

Co-authored-by: Yong He <yhe@nvidia.com>

2 files changed, 30 insertions, 0 deletions

diff --git a/tests/language-feature/generics/generic-value-constant-folding.slang b/tests/language-feature/generics/generic-value-constant-folding.slang
new file mode 100644
index 000000000..1d6781889
--- /dev/null
+++ b/tests/language-feature/generics/generic-value-constant-folding.slang
@@ -0,0 +1,25 @@
+//TEST(compute):COMPARE_COMPUTE: -shaderobj -output-using-type
+
+struct PlusOne<let v : int>
+{ 
+    static const int value = v + 1;
+}
+
+struct GetConst<let v : int, let u : int>
+{
+    static const int value = (u+v)*(u+v) + PlusOne<u-1>.value;
+    int arr[value];
+}
+
+//TEST_INPUT:ubuffer(data=[0 0 0 0], stride=4):out,name=outputBuffer
+RWStructuredBuffer<int> outputBuffer;
+
+[numthreads(4, 1, 1)]
+void computeMain(int3 dispatchThreadID : SV_DispatchThreadID)
+{
+    int tid = dispatchThreadID.x;
+    int inVal = tid;
+    int arr[GetConst<5,2>.value + 1];
+    arr[0] = GetConst<5,3>.value + 1;
+    outputBuffer[tid] = arr[0];
+}
diff --git a/tests/language-feature/generics/generic-value-constant-folding.slang.expected.txt b/tests/language-feature/generics/generic-value-constant-folding.slang.expected.txt
new file mode 100644
index 000000000..2ba17a828
--- /dev/null
+++ b/tests/language-feature/generics/generic-value-constant-folding.slang.expected.txt
@@ -0,0 +1,5 @@
+type: int32_t
+68
+68
+68
+68